JPS588465B2 - Weight type crack generating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a weight-type crack generation device for generating cracks in a plate material for testing the mechanical properties of the plate material used in large structures and the like.

In order to test the mechanical properties of plate materials used in large structures, etc., crack propagation tests have traditionally been carried out by generating cracks. Test equipment etc. are used.

However, in conventional double tension test equipment, in order to pull the test plate from both sides, ears must be protruded from the plate to form a catch, and the test plate must have a special shape. Must be.

In addition, the structure of the Esso test equipment is extremely complicated because the weight is pressurized with gas and dropped.

The present invention has been made by focusing on these points, and involves inserting a wedge into a slit in a test plate with slits formed in advance, and then dropping a weight from a certain height onto the wedge holder to which the wedge is attached. This is a device that generates , and the weight is lifted using a lifting magnet.

A description will be given below based on the drawings showing one embodiment.

In the figure, 1 is a frame consisting of four pillars, 2 is a column set on frame 1, 3 is a pair of brackets suspended and fixed on both sides of column 2, and 4 is sandwiched between a pair of brackets 3. It is a vertically slidable wedge holder receiving seat with a guide frame 5 erected thereon, and it is guided by the guide frame 5 and slides vertically between the brackets 3.

Reference numeral 6 designates a wedge holder with a wedge 7 attached to its lower end, which is fitted into and held in the center hole of the wedge holder seat 4, and held in place by a wedge holder presser 8 fixed near the center hole of the wedge holder seat 4. Supported.

9 is a through hole provided in the wedge holder seat 4 to fit the lower end of the bracket 3 when the wedge holder seat 4 slides upward as shown by the dashed line in FIG. 5; 10 is the wedge holder seat 4; It is a cylindrical seat leg hanging down and fixed to the lower surface of both ends of the frame, and is fitted into the ram 13 of the electric cylinder 12 set on the base 11 fixed at predetermined positions on both sides of the frame. A horizontal pin 15 pivotally attached to the upper end of the ram 13 is inserted into a long hole 14 provided on both sides of the ram 13.

16 is a protrusion 17 fixed to the lower surface of the wedge holder seat 4
The position of the wedge 7 is adjusted by bringing the tip of the threaded rod of the adjusting handle 16 into contact with the wedge holder 6 and pushing it sideways.

18 is a buffer cylinder mounted vertically on the base 11;
Two piston heads 1 are provided on both sides of the frame 1.
Numeral 9 is located close to the lower surface of the wedge holder seat and buffers the impact applied to the wedge holder seat 4 due to a falling weight, which will be described later.

20 is a weight guide tube set on the frame 1, 21 is a weight that rises or falls within the guide tube 20, and the weight 21 is lifted by an electromagnet suspended from the upper end of the frame by a winch or the like. It is caused to fall by cutting.

Reference numeral 22 denotes a test plate material, in which a slit 23 is cut in advance so that the tip of the wedge 7 can be inserted slightly.

The weight type crack generating device of the present invention is constructed as described above, and its operation will be described below.

First, the test plate material 22 is set on the pedestal 24,
Test plate material 2 for transporting the weight-type crack generation device of the present invention by crane
2 on the base 25.

At this time, the wedge 7 is placed on the test plate 22, raises the ram 13 of the electric cylinder 12, and raises the horizontal pin 15.
, the wedge holder seat 4 is raised through the elongated hole 14, the wedge holder seat leg 10, etc., the position of the wedge holder 6 is adjusted using the adjustment handle 16, and the wedge 7 fixed on the wedge holder 6 is inserted into the slit 23 of the test plate 22. At the insertion position, the ram 13 of the electric cylinder 12 is lowered and the tip of the wedge 7 is inserted into the slit 23 of the test plate 22.

The piston 19 of the buffer cylinder 18 is automatically extended during the above-mentioned raising process and brought close to the lower surface of the wedge holder seat 4.

When the ram 13 of the electric cylinder 12 is further lowered, the horizontal pin 15 pivoted on the upper end of the ram is moved to the wedge holder seat leg 10.
Because the wedge holder seat 4 is inserted into the long hole 14 of
The ram 13 alone, supported by the test plate 22, descends without the wedge holder seat 4, and the horizontal pin 15 pivoted at the tip of the ram 13 comes into contact with the lower end of the long hole 14 of the seat leg 10. lower to.

In this case, therefore, the ram 13 of the electric cylinder 12 no longer supports the wedge holder seat 4, but the wedge holder seat 4 is supported by the test plate 22.

Next, the weight 21 is attracted by an electromagnet suspended from the upper end of the frame 1, suspended by a winch, and lifted to the upper end of the frame 1, after which the electromagnet is turned off and the weight 21 is dropped.

This impact energy is transmitted to the test plate 22 via the wedge holder 6 and the wedge 7.

After the test plate cracks, the falling energy of the weight and the falling of the wedge holder seat 4, wedge holder 6, and wedge 7 are all absorbed by the buffer cylinder 18.

Therefore, no impact is applied to the electric cylinder 12 when the weight falls.

After creating a crack in the test plate 22, remove the weight-type crack generating device by performing the reverse operation to the above, fit it onto the next test plate, and then apply the weight again to the test plate. When set in a type crack generator, cracks can be generated in the test plate in the same manner as described above.

As explained above, the weight type crack generation device of the present invention inserts the tip of the wedge into a test plate with a slit in advance, and drops the weight from a certain height onto the wedge holder to which the wedge is attached. The weight is driven into the test board to cause cracks in the test board, and the weight is lifted using an electromagnet, so the structure is not as complex as the conventional Esso test equipment, and it is not as complex as the conventional double tension test equipment. Unlike a testing machine, there is no need to form an extra special shape on the test plate, and since it is easy to install and remove, it can be used portablely, and the tall frame allows it to be used on large plates. You can do this, and the effect is similar to that of a dog.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show an embodiment of the weight-type crack generation device of the present invention, in which FIG. 1 is a partially sectional front view thereof, FIG. 2 is a partially sectional side view thereof, and FIG. 3 is a partially sectional side view thereof. 1 is a sectional view taken along the line A-A in FIG. 1, FIG. 4 is a partially enlarged side view of the test plate material, and FIG. 5 is an enlarged view of the main part of FIG. 1. 1...Frame, 2...Column, 3.
... Bracket, 4 ... Wedge holder seat, 5 ... Guide frame, 6 ... Wedge holder, 7 ... Wedge, 8 ... ... Wedge holder holder, 9 ... Toko L 10 ... Seat leg, 11 ... Base, 12 ... Electric cylinder, 13 ... ...Ram, 14...Firstborn L
15...Horizontal pin, 16...Adjustment handle, 18...Buffer cylinder, 20...
Weight guide tube, 21... Weight.

Claims (1)

[Claims] 1. A weight guide tube that guides the movement of a weight that is moved up and down along the vertical axis of the frame between the columns that are set between the upper columns of a frame consisting of four columns, and A pair of left and right drooping brackets that guide the movement of a guide frame (described later) that moves up and down below are integrally fixed and held, and at predetermined positions below the pair of columns, each bracket is parallel to the column. A pair of cylindrical seat legs are provided at the bottom of the pair of bases, each having a pair of cylindrical seat legs slidably fitted loosely into the rams of a pair of electric cylinders that are set upright at the center of the bases, respectively, and A wedge holder with a wedge attached to the lower end is loosely fitted into an opening provided in the center of the wedge holder, and a wedge holder presser is fixedly held therein, and a guide frame guided by the bracket and the bracket are passed through the outside of the wedge holder presser. The cylindrical seat leg is provided with a long through hole in the vertical direction so that the wedge holder seat, which has a through hole, can be pushed up by the pair of rams, and only the rams can be lowered at a required height position. A horizontal pin is provided at the end to engage and support the wedge holder, and a pair of buffer cylinders are provided on each of the pair of bases on both sides of the electric cylinder so that the wedge holder seat automatically follows when the wedge holder seat rises. A weight-type crack generating device characterized by being constructed in an upright manner so that it can be extended and always provided with a predetermined amount of cushioning.